What is Dormancy? - Definition from MaximumYield

Dormancy refers to the period of the life cycle of plants where plants enter dormancy. Most plants go to sleep during the cold winter. The factory has to take a break to reproduce next year.

Some plant species also fall asleep during periods of overheating and drought. During the hot and dry period, the plants start to shed leaves to preserve valuable water and energy.

Many trees need dormancy period and cold exposure period to regain new growth. Fruit trees such as apples must have a certain cold period during dormancy to produce fruits during the next season.

When the day begins to shrink, sleep occurs naturally. The darkness of the night exceeds whiteness during the day. Plants can feel the lack of sunlight, it begins to make the plant system dormant. Trees, shrubs or plants will stop generating new growth and begin to flush their leaves

When the temperature goes down, the plants become dormant. The maximum growth of plants is a dormant state, but its roots still exist and continue to grow further.

As the weather begins to warm up and the soil temperature rises, plants begin to break dormancy. This happens when the day starts to grow and the sunshine time gets longer.

If mature viable seeds can not germinate under favorable conditions, it is said to be in a dormant state. Seed dormancy is known as embryonic dormancy or internal dormancy and is caused by the intrinsic characteristics of the embryos that prevent germination (Black M, Butler J, Hughes M. 1987). Dormancy should not be confused with seed coat dormancy, external dormancy or hard shell caused by hard seed covering and seed coat that prevents water and oxygen from reaching and activating the embryo. It is a physical barrier to germination and not a real form of dormancy (Quinliven, 1971; Quinliven and Nichol, 1971)

One function of dormancy is to prevent seeds from germinating before being surrounded by the preferred environment. In some trees and shrubs, even if the environment is ideal, it is difficult to break the seed dormancy. Seeds breaking dormancy and undergo various treatments to begin germination. Seed scratching involves breaking, scratching, or softening the seed coat so that water can invade and start the germination process. There are several ways to hurt seeds. In acid scratches, seeds are placed in glass containers and are covered with concentrated sulfuric acid. Depending on the hardness of the seed coat, soak the seeds gently and soak it for 10 minutes to several hours while stirring. When the seed coat becomes thin, seeds can be removed, washed and planted. Another way of scratching is mechanical. Rub the seeds with metal, scrape with sandpaper, or break with hammer to weaken the seed coat

In order to get the seed out of dormancy, you must break physical or chemical dormancy. Seeds have hard or thick seed coats (physical dormancy). This can be broken by dipping or scratching the surface (scratching the surface). Other seeds have chemical or metabolic internal conditions to prevent germination (chemical dormancy). Factors affecting seed dormancy include the presence of certain plant hormones, in particular abscisic acid that inhibits germination, and gibberellin, which terminates dormancy of the seed. In order to break chemical diapause, it may be necessary to leach out the seeds or to use cold / wet delamination or burns. For example, membranes within the seed coat of some seeds form water-impermeable, oxygen-impermeable barriers. Oxygen can enter the seed at low temperatures (50-59 ° F), and at warmer temperatures it absorbs oxygen. A cool temperature also allows seeds to digest some food reserves and provide energy